51090300 has 54 divisors (see below), whose sum is σ = 160142528. Its totient is φ = 13623840.

The previous prime is 51090271. The next prime is 51090307. The reversal of 51090300 is 309015.

It is a super-2 number, since 2×51090300² = 5220437508180000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51090307) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27484 + ... + 29283.

Almost surely, 2^51090300 is an apocalyptic number.

51090300 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51090300 is an abundant number, since it is smaller than the sum of its proper divisors (109052228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51090300 is a wasteful number, since it uses less digits than its factorization.

51090300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56787 (or 56777 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 51090300 is about 7147.7478970652. The cubic root of 51090300 is about 371.0617179480.

Adding to 51090300 its reverse (309015), we get a palindrome (51399315).

The spelling of 51090300 in words is "fifty-one million, ninety thousand, three hundred".